package com.hjl.servlet;

import com.hjl.dao.UserDao;
import com.hjl.dao.impl.UserDaoImpl;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.PrintWriter;

/**
 * @author ServivE
 * @version 0.1
 * @className CheckUsernameServlet
 * @description
 * @date 2024/7/25 15:41
 * @since jdk11
 */
@WebServlet("/checkName")
public class CheckUsernameServlet extends HttpServlet {
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        String username = request.getParameter("username");
        UserDao userDao = new UserDaoImpl();
        boolean flag = userDao.checkUsername(username);
        PrintWriter out = response.getWriter();
        //ajax
        if (flag) {
            out.print("true");
        } else {
            out.print("false");
        }
    }
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        doPost(req, resp);
    }
}
